7x^2+6x-81=0

Solution for 7x^2+6x-81=0 equation:

Simplifying
7x2 + 6x + -81 = 0

Reorder the terms:
-81 + 6x + 7x2 = 0

Solving
-81 + 6x + 7x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-27 + -7x)(3 + -1x) = 0

Subproblem 1
Set the factor '(-27 + -7x)' equal to zero and attempt to solve:

Simplifying
-27 + -7x = 0

Solving
-27 + -7x = 0

Move all terms containing x to the left, all other terms to the right.

Add '27' to each side of the equation.
-27 + 27 + -7x = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -7x = 0 + 27
-7x = 0 + 27

Combine like terms: 0 + 27 = 27
-7x = 27

Divide each side by '-7'.
x = -3.857142857

Simplifying
x = -3.857142857
Subproblem 2
Set the factor '(3 + -1x)' equal to zero and attempt to solve:

Simplifying
3 + -1x = 0

Solving
3 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-3' to each side of the equation.
3 + -3 + -1x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1x = 0 + -3
-1x = 0 + -3

Combine like terms: 0 + -3 = -3
-1x = -3

Divide each side by '-1'.
x = 3

Simplifying
x = 3
Solution
x = {-3.857142857, 3}